Selenium vs Tin
| Property | Se Selenium | Sn Tin |
|---|---|---|
| Atomic number | 34 | 50 |
| Symbol | Se | Sn |
| Name | Selenium | Tin |
| Category | nonmetal | post-transition-metal |
| Standard Atomic Weight | 78.971 u | 118.71 u |
| Period | 4 | 5 |
| Group | 16 | 14 |
| Block | p | p |
| Phase at STP | solid | solid |
| Electron configuration | [Ar]4s23d104p4 | [Kr]5s24d105p2 |
| Oxidation states | [-2, -1, 0, 1, 2, 3, 4, 5, 6] | [-4, -3, -2, -1, 0, 1, 2, 3, 4] |
| Electronegativity (Pauling) | 2.55 | 1.96 |
| Electron affinity | 2.0206 eV | 1.112 eV |
| Density | 4809 kg/m³ | 7287 kg/m³ |
| Melting point | 220.5 °C | 231.93 °C |
| Boiling point | 684.85 °C | 2601.85 °C |
| Discovery year | 1817 | N/A |